9042da8301
add rseq support Signed-off-by: qinyu <qinyu16@huawei.com> (cherry picked from commit db74864101252bb75250782ca32e47d1b1545c1f)
45 lines
1.4 KiB
Diff
45 lines
1.4 KiB
Diff
From 210967ce32172eb7356747ed0b655e1fc37d0c57 Mon Sep 17 00:00:00 2001
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From: Florian Weimer <fweimer@redhat.com>
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Date: Thu, 9 Dec 2021 09:49:32 +0100
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Subject: [PATCH 8/9] nptl: rseq failure after registration on main thread is
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fatal
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This simplifies the application programming model.
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Browser sandboxes have already been fixed:
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Sandbox is incompatible with rseq registration
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<https://bugzilla.mozilla.org/show_bug.cgi?id=1651701>
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Allow rseq in the Linux sandboxes. r=gcp
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<https://hg.mozilla.org/mozilla-central/rev/042425712eb1>
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Sandbox needs to support rseq system call
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<https://bugs.chromium.org/p/chromium/issues/detail?id=1104160>
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Linux sandbox: Allow rseq(2)
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<https://chromium.googlesource.com/chromium/src.git/+/230675d9ac8f1>
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Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
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---
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nptl/pthread_create.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c
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index f405fa35..109c5e3d 100644
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--- a/nptl/pthread_create.c
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+++ b/nptl/pthread_create.c
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@@ -371,7 +371,8 @@ start_thread (void *arg)
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/* Register rseq TLS to the kernel. */
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{
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bool do_rseq = THREAD_GETMEM (pd, flags) & ATTR_FLAG_DO_RSEQ;
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- rseq_register_current_thread (pd, do_rseq);
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+ if (!rseq_register_current_thread (pd, do_rseq) && do_rseq)
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+ __libc_fatal ("Fatal glibc error: rseq registration failed\n");
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}
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#ifndef __ASSUME_SET_ROBUST_LIST
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--
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2.23.0
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